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Your Trusted Auto Repair Experts in Mesa
521 Automotive is a locally-owned and family-operated auto repair shop in Mesa, Arizona, founded by Bill and Mariah. With over 20 years of combined automotive experience, we specialize in providing top-quality repairs, maintenance, and custom performance upgrades for all vehicle types. Our ASE Master Certified technicians prioritize honest diagnoses, affordable pricing, and exceptional customer care, treating every vehicle as if it were our own.

We serve both everyday drivers and specialty vehicles, including hot rods, classics, and Isuzu commercial vehicles, using factory diagnostic tools for precision. Our commitment to transparency, preventive maintenance, and community trust has earned us a reputation as Mesa's trusted family mechanic.
Services
Auto Repairs Maintenance Custom Projects Brake Repair Fleet Services AC Services Motor Swaps Performance Upgrades Transmission Repair Isuzu Repairs
Highlights and features
  • ASE Master Certified technicians with 20+ years of automotive expertise
  • Factory diagnostic tools for precise Isuzu NPR/NQR and specialty vehicle repairs
  • Free vehicle inspections during oil changes to prevent costly breakdowns
  • Transparent pricing with financing options for unexpected repairs
  • Open-door policy for client questions and vehicle concerns
Associations and certifications
  • ASE Certified
  • NAPA AutoCare Center
What people say
Honest and reasonably priced Excellent experiences Knowledgeable and prompt Family-friendly environment Accurate diagnostics
Services
Auto Repairs
521 Automotive provides comprehensive auto repairs for both minor and major issues, including engine diagnostics, headlight replacement, and complete engine swaps. Our ASE-certified technicians handle electrical system failures, transmission replacements, and complex mechanical repairs using factory tools. We specialize in restoring vehicle performance while maintaining cost-effectiveness through quality parts and precise diagnostics.
Maintenance
Our preventive maintenance services include oil changes, brake inspections, and 100,000-mile tune-ups to extend vehicle longevity. Every oil change includes a complimentary inspection of fluids, belts, and hoses. We perform power steering flushes, battery testing, and suspension checks to identify potential issues early, reducing long-term repair costs while ensuring safety and reliability.
Custom Projects
We specialize in custom automotive projects, including LS engine swaps, EFI upgrades, and classic car restorations. Our team handles hot rod modifications, custom exhaust systems, and performance tuning for enhanced horsepower. From partial restorations to full builds, we collaborate with clients to transform vehicles while maintaining mechanical integrity and street legality.
Brake Repair
Our brake repair services cover pad replacements, rotor resurfacing, and hydraulic system diagnostics. Using a Pro-Cut lathe for precise rotor matching, we reduce vibration and noise while extending brake life. We address spongy pedals, warning lights, and unusual noises to restore stopping power, ensuring safety through proper brake fluid maintenance and component replacement.
Fleet Services
521 Automotive offers tailored fleet maintenance for businesses operating vehicles ranging from cars to Isuzu NPR commercial trucks. We provide scheduled maintenance plans, pickup/drop-off services, and priority emergency repairs. Our diagnostics and preventive care minimize downtime while managing costs through bulk service pricing and detailed repair tracking for business fleets.
People
Bill
Owner & ASE Master Technician
Bill has over 20 years of automotive experience, starting with early mechanical projects and formal training through hands-on work. He specializes in complex diagnostics and performance builds, holding ASE Master Certification. His expertise spans engine swaps, electrical systems, and commercial vehicle repairs.
Mariah
Business Manager
Mariah transitioned from a small business background to automotive operations after meeting Bill. She manages daily operations, client relations, and financial planning. Her focus on transparency and customer education complements Bill's technical expertise, creating a balanced approach to service and business growth.
Questions
What types of vehicles do you service?
We service all makes and models, including specialty vehicles like hot rods, classics, and Isuzu commercial trucks. Our ASE-certified technicians handle everything from daily drivers to performance builds.
Do you offer financing options?
Yes, we provide financing through a third-party provider with low monthly payments, instant credit decisions, and promotional offers to help customers manage unexpected repair costs.
How can I schedule an appointment?
Schedule online through our website or call us directly at (480) 400-0513. We offer weekday service hours and prioritize urgent repairs for fleet customers.
Are your technicians certified?
All our mechanics are ASE-certified, with Bill holding ASE Master Technician status. We maintain factory-level diagnostic tools for specialized repairs on modern and vintage vehicles.
What preventive maintenance services do you provide?
We offer oil changes, brake inspections, fluid flushes, battery testing, and comprehensive vehicle checks during every service to identify potential issues before they become major problems.
Do you work on commercial fleets?
Yes, we service commercial fleets including Isuzu NPR/NQR trucks. Our services include scheduled maintenance, emergency repairs, and pickup/drop-off options to minimize business downtime.